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Re: [OM] Changing lens mount

Subject: Re: [OM] Changing lens mount
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
Date: Fri, 3 Dec 2010 17:09:05 -0600
Well put.  Leica designed the Leica M camera so that an adapter for LTM 
(thread mount) lenses is exactly 1mm.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Friday, December 03, 2010 4:58 PM
Subject: Re: [OM] Changing lens mount


> To clarify, if the register distance of the adapted lens is shorter than
> that of the body being adapted to you can never reach infinity without
> inserting an optical element (which acts like a low power
> tele-converter).  But you could use such a setup as a macro lens
> provided you don't mind not being able to focus further than a meter or
> two or three.  However, even if the register distance of the lens is
> longer than that of the body it must be enough longer to accommodate the
> thickness of an adapter.  One millimeter or thereabouts is probably
> about the practical minimum.  The has to be enough metal for strength.
>
> Chuck Norcutt
>
> On 12/3/2010 3:43 PM, Andrew Fildes wrote:
>> No, but it means that you may not achieve infinity focus.
>> And as most lenses move a lot at the close end but not much at the long 
>> end, you may miss inf. by quite a lot.
>> Andrew Fildes
>> afildes@xxxxxxxxxxxxx
>>
>>
>>
>> On 04/12/2010, at 7:24 AM, AS wrote:
>>
>>> The differences in register are very small....sometimes a mm or less, 
>>> what difference does that make? Does this affect the ability to focus?
>>
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